Definition of nucleus

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Nucleus (n.) A kernel; hence, a central mass or point about which matter is gathered, or to which accretion is made; the central or material portion; -- used both literally and figuratively..

Lern More About Nucleus

Nucleoidioplasma :: Nucleoidioplasma (n.) Hyaline plasma contained in the nucleus of vegetable cells.
Indogen :: Indogen (n.) A complex, nitrogenous radical, C8H5NO, regarded as the essential nucleus of indigo..
Gymnocyte :: Gymnocyte (n.) A cytode without a proper cell wall, but with a nucleus..
Karyomiton :: Karyomiton (n.) The reticular network of fine fibers, of which the nucleus of a cell is in part composed; -- in opposition to kytomiton, or the network in the body of the cell..
Multispiral :: Multispiral (a.) Having numerous spiral coils round a center or nucleus; -- said of the opercula of certain shells.
Chromosome :: Chromosome (n.) One of the minute bodies into which the chromatin of the nucleus is resolved during mitotic cell division; the idant of Weismann.
Nucleoplasm :: Nucleoplasm (n.) The matter composing the nucleus of a cell; the protoplasm of the nucleus; karyoplasma.
Chalaza :: Chalaza (n.) The place on an ovule, or seed, where its outer coats cohere with each other and the nucleus..
Endoplast :: Endoplast (n.) See Nucleus.
Nucleus :: Nucleus (n.) An incipient ovule of soft cellular tissue.
Phosphoryl :: Phosphoryl (n.) The radical PO, regarded as the typical nucleus of certain compounds..
Plastin :: Plastin (n.) A substance associated with nuclein in cell nuclei, and by some considered as the fundamental substance of the nucleus..
Nucleus :: Nucleus (n.) A body, usually spheroidal, in a cell or a protozoan, distinguished from the surrounding protoplasm by a difference in refrangibility and in behavior towards chemical reagents. It is more or less protoplasmic, and consists of a clear fluid (achromatin) through which extends a network of fibers (chromatin) in which may be suspended a second rounded body, the nucleolus (see Nucleoplasm). See Cell division, under Division..
Endoplastica :: Endoplastica (n. pl.) A group of Rhizopoda having a distinct nucleus, as the am/ba..
Centrosome :: Centrosome (n.) A peculiar rounded body lying near the nucleus of a cell. It is regarded as the dynamic element by means of which the machinery of cell division is organized.
Phosphonium :: Phosphonium (n.) The hypothetical radical PH4, analogous to ammonium, and regarded as the nucleus of certain derivatives of phosphine..
Nucleoplasmic :: Nucleoplasmic (a.) Of or pertaining to nucleoplasm; -- esp. applied to a body formed in the developing ovum from the plasma of the nucleus of the germinal vesicle.
Nuclear :: Nuclear (a.) Of or pertaining to a nucleus; as, the nuclear spindle (see Illust. of Karyokinesis) or the nuclear fibrils of a cell; the nuclear part of a comet, etc..
Nucleiform :: Nucleiform (a.) Formed like a nucleus or kernel.
Nucleate :: Nucleate (v. t.) To gather, as about a nucleus or center..
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